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Question

Ravi and Kumar are working on an assignment. Ravi takes 6 hours to type 32 pages on a computer, while Kumar takes 5 hours to type 40 pages. How much time will they take, working together on two different computers to type an assignment of 110 pages?


A
20 hours
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B
5 hours 40 minutes
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C
8 hours 15 minutes
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D
23 hours
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Solution

The correct option is B 8 hours 15 minutes
Number of pages typed by Ravi in 1 hour=326=163
Number of pages typed by Kumar in 1 hour=405=8
Number of pages typed by both in 1 hour=(163+8)=403.
Time taken by both to type 110 pages=(110×340)hours.
=814 hours (or) 8 hours 15 minutes..

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